@article{PORMA_1997__54_4_48037,
     author = {Ferreira, F.F. and Pinto, A.A.},
     title = {Existence of eigenvalues for (uaa) {Markov} maps.},
     journal = {Portugaliae mathematica},
     pages = {421--429},
     publisher = {mathdoc},
     volume = {54},
     number = {4},
     year = {1997},
     zbl = {0903.58025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_4_48037/}
}